Valve device



March 20, 1928.

G. A. MORRISON VALVE DEVICE f wn Wm w Z 6 0. 7t .14. "an" I I flfi r 1.1. wi 22 1 Afly, 5/2 m W Original Filed July 5, 1926 V .n N.

Patented Mar. 20, 1928.

UNITED STATES PATENT, OFFICE.

GEORGE A. MORRISON, OF PARK RIDGE, ILLINOIS, ASSIGNOR TO TOBCHWELDEQUIP- MENT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

VALVE DEVICE.

Urig'inaI application filed July 3, 1926, Se1'ia1 No. 120,418. Dividedand this application filed January 3,

' 1927. Serial No. 158,709.

My invention relates more particularly, though not exclusively, to valvedevices of torches of the so-called oxy-acetylene type and provided tocontrol gas flow therethrough; my primary object being to provide aconstruction of Valve device of the metalto-mctal type, to the end thata tight seat will be aiforded, my present application being a divisionof my application for U. S. to patent Serial No. 120,418, filed July 3,1926.

Referring to the accompanying draw- 1ng:

Figure 1 is a view in side elevation of 'a cutting torch of theoxy-acetylene type 1n which my improved valve is incorporated, thehandle-forming casing of the torch being shown in section. Fig. 2 is anenlarged broken view in longitudinal section of the valve-equipped bodyportion of the torch, illustrating details of my improved valve device;and Fig. 3, a broken section taken at the line 3 on Fig. 2 and viewed inthe direction of the arrow.

The particular construction of torch shown and which is of theconstruction shown in my said pending application Serial No. 120,418, isa cutting torch of the oxyacetylene type comprising a body portion 4equipped with pipe fittings 5 and 6 for conn nection, respectively, withsupplies of oxygen andacetylene under pressure, the pipe 6 for theacetylene, being provided with a valve 7, as for example of the needletype, for regulating the flow of acetylene therethrough and into themember 1. The body 41 at its forwardend connects with pipes 8, 9 and,10, the pipe 8 being for high pressure oxygen supplied through thefitting 5 and controlled-by the valve device hereinafter described, thepipe 9 for acetylene and the pipe 10 for low-pressure oxygen suppliedfrom the fitting 5 in a manner not shown because it forms no part of thepresent invention. The torch also comprises a mixing chamber 11 suppliedwith oxygen and acetylene from the pipes 9 and 10 and discharging into apipe 12 which, with the outlet of the pipe 8, opens into ahead 13equipped with a burner tip 1 1.

My improved valve device is represented generally at 15 and is shown ascontrolling the flow of oxygen from the fitting 5 to the pipe 8 throughpassages 16 and 17in the member 44-, the passage 16 communicating at oneend with the fitting 5, and the passage 17 at one end with the pipe 8.The other ends of these passages communicate with a recess 18 in thebody 4, the walls of which form the casing for the valve proper 19 ofthe valvedevice 15. The recess 18 is closed at one end by a plug 20 andopens, at its other end,

into a bore21 of reduced diameter, through which the passage 17communicates with the recess 18. Ad acent the juncture of the recess 18and the bore 21 the end-wall of the recess 18 is shaped to form avalve-seat 22 which is circular in cross-section with its wall flaringoutwardly into the recess 18 and of convex form as shown, thereby toprovide a convex seat circular in cross-section and flaring toward thevalve-proper 19.

The valve 19 at the end thereof at which it engages with the seat 22,when the valve is closed, is formed to provide a relatively thin,flexible, annular portion 23 which, in the seatingof the valve againstthe valve seat, deforms to precisely conform with the portion of thevalve seat 22 with which it engages. The shape and proportions of thesecooperating parts are such, as shown, that in the initial contacting ofthe terminal edge of the skirt portion 23, with the convexed valve seat,such engagement will be a circular line contact, and as the valve iscrowded against the seat this terminal edge becomes deformed'toaccurately fit the seat, with a continuing circular line contact betweenthese parts, such linecontact being maintained throughout the movementof the valve to seated position, due to the provision of the valve seatas of convexed form.

The portion 23 of the valve may be formed, as shown, by recessing theend of the valve as represented at 24:, with its outer surfacepreferably tapering as shown, the valve being made of any suitablematerial having such characteristicsthat it will deform as stated, asfor example of bronze.

In orderthat the gas may pass from the passage 16 into the recess 18,the flow from which latterto the bore 21 is controlled by the valveproper 19, the side wall of the valve is spaced from the wall of therecess 18, as for example by forming the body portion of the valve 19 ofhexagonal form as illustrated in Fig. 3, whereby its edge portionsformed by the junctures of its angularly disposed sides, guidinglyengage the wall of the recess 18.

The valve proper 19 is shown as spring pressed toward the seat withwhich it cooperates, this spring being represented at and shown asextending into a socket 26 in the valve proper 19 and into a socket 27in the plug 20.

In the arrangement shown, means are provided for manually controllingthe position of the valve n'oper 19, these means comprising atriggenlike lever 28 pivotally supported at 29 on a bracket 30 securedin fixed relation to the pipes 8 and 10, this lever cooperating with asliding rod 31 which is slidable in the member 1, engaging at one endwith the. cam surface of the lever :28 and at its opposite end with the"forward end-portion oi the valve proper 19, the arrangement oi the i asshown being such that, when the lG 28 is rocked in clockwise directionin Fig. '1. the rod 31 will be shifted to the left and open the valveproper 19 against the action of its spring 25.

The feature of providing the circular, single line contact between thevalve proper 19 and the seat 22, as above described, is of pr: where thevalve is provided for the controlling of gas in the specific instanceillustrated and above described, inasmuch as thereby the seat 22 isrendered self cleaning by the action of the valve proper 19 inmovingagainst it, and the danger of solid particles becoming interposedbetween interengaging potions of the seat and valve proper, which wouldimpair the proper seating of the valve and scratch or abrade these partsand thereby produce leakage, is avoided.

l i hile l have illustrated and described a particular en'ibodiment ofmy invention, I do not wish to be understood as intending to limit itthereto, as the same may be variously modified a d altered withoutdeparting from the spirit of my invention.

What I claim as new and desire to secure by Letters Patent is:

1. in a valve device, the combination of its casing containing anoutwardly flaring valve-seat, and a valve having a relatively thin,flexible, annular, end portion at which it bears against the surface ofsaid valve-seat, said seat and 'alve being so shaped that said valvemoves contormingly along said seat with circular hair-line contacttherewith,

In a valve device, the combination of its casing containing a flaringconvexed tical importance particularly' accessesa valve-seat, and avalve having a relatively thin, flexible, annular end portion at whichit bears against the convened surface of said seat with a single,circular line contact.

3. In a valve device, the combination of its casing containing anoutwardly flaring valve-seat, and a valve seating in the direction offlow of fluid through said casing and having a relatively thin,flexible, annular, end portion at which it bears against the surface ofsaid valve-seat, said seat and valve being so shaped that said valvemoves conl'ormingly along said seat with circular hair-line contacttherewith.

4:. In a valve device, the combination of its casing containing anoutwardly flaring valve-seat, a valve cooperating with said seat, and, aspring yieldingly forcing said valve against said seat, said valvehaving a relatively thin, flexible, annular, end portion which it bearsagainst the surface of said valve-seat, said seat and valve being soshaped that said valve moves contormingly along said seat with circularhair-line contact therewith.

5. A gas-burning device comprising a member containing a gas-passageprovided with a valve-seat, and a valve movable to closed position bythe pressure of the gas in said passage and cooperating with said seatand having a relatively thin flexible end POL tion at which it bearsconi'ormingly against said seat.

6. A gas-burning device comprising a member containing a gas-passageprovided with an outwardly flaring valve seat, and a valve movable toclosed position by the pressure of the gas in said passage andcooperating with said seat and having a relatively thin flexible endportion at which it bears contormingly against said seat.

7. A gas-burning device comprising a member containing a gas-passageprovided with a valve-seat, a valve movable to closed position by thepressure of the gas in said passage and cooperating with said seat andhaving a relatively thin flexible end por tion at which it bearscontormingly against said seat, and a spring yieldingly forcing saidvalve against said seat.

8. A gas-burning device comprising a member containing a gas-passageprovided with a valve seat, and a valve cooperating with said seat andseating in the direction of, and by, the flow of fluid through saidpassage and having a relatively thin flexible end portion at which itbears conformingly against said seat.

GEORGE A. MORRISON.

